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Siemens 5SJ4 Miniature Circuit Breaker - 10A, D-Curve, 14kA

Siemens 5SJ4 2-pole miniature circuit breaker, 10A, D-curve, 14kA.

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ManufacturerSiemens

Part number5SJ4210-8HG41

Poles 2

Rated Current 10A

Tripping Curve D

Breaking Capacity 14kA

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2-pole design D-curve tripping characteristic 14kA breaking capacity UL 489 listed 10A rated current Handles high inrush

Product description

The Siemens 5SJ4210-8HG41 is a 2-pole miniature circuit breaker featuring a D-curve tripping characteristic, designed for circuits with high inrush currents. It has a rated current of 10A and a breaking capacity of 14kA, suitable for demanding applications. This breaker operates at 240V and has a depth of 70mm, conforming to UL 489 standards.

This circuit breaker is ideal for protecting motor circuits, transformer feeders, and other loads that experience significant temporary surges during startup. The D-curve ensures that the breaker does not trip unnecessarily during these inrush events while still providing protection against short circuits.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 5SJ4210-8HG41. We provide reliable access to high-quality automation components, helping you complete your projects efficiently and affordably.

Technical specifications

Poles	2
Rated Current	10A
Tripping Curve	D
Breaking Capacity	14kA
Voltage Rating	240V
Depth	70 mm
Standard	UL 489

Common applications

Motor protection

Transformer circuits

Industrial machinery

High inrush loads

Power distribution

Compatible systems

240V AC circuits UL 489 compliant electrical systems Motor control circuits

Also known as

Siemens 5SJ4 D-curve 10A breaker 5SJ4210-8HG41 breaker Siemens 240V D-curve

Replaces / compatible with

This breaker can replace older Siemens 5SJ series models or other UL 489 compliant 2-pole, 10A, D-curve circuit breakers.

Technical note

Expert tip

Ensure the upstream power source can support the motor's starting current to prevent nuisance tripping of the D-curve breaker.

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Frequently asked questions

When should I use a D-curve breaker like the Siemens 5SJ4210-8HG41?

A D-curve breaker, such as the Siemens 5SJ4210-8HG41, is recommended for protecting equipment with high starting currents, like motors and transformers. Its tripping characteristic allows for temporary inrush currents of 10 to 20 times the rated current without nuisance tripping.